JP6676538B2 - Map updating system, map updating method, server device and navigation device for map updating system - Google Patents

Description

  The present invention relates to an updated map distribution device, an updated map distribution method, a computer program, and a recording medium on which the computer program is recorded.

Generally, in order to display a map on a navigation device at different scales, map data corresponding to a map of each scale is stored in the navigation device for each layer. Various methods have been proposed as a method for updating map data stored in such a navigation device.
For example, as a method of updating old map data stored in the navigation device to new map data, a method for updating one layer, which is difference data between old map data and new map data generated in the map update server, is used. Based on the difference data, one layer of the old map data in the navigation device is updated to the new map data, and the contents of the updated map data of the layer are reflected in the map data of the other layers, thereby providing a map of all layers. There is a method of updating data.
See also Patent Documents 1 to 5 which disclose the prior art related to the present invention.

International Publication No. WO 2010/007690 International Publication No. WO 2010/007689 JP 2012-189448 A JP 2004-347988 A JP 2004-70323 A

However, according to the above method, since only the difference data corresponding to one layer is distributed to the navigation device, the distribution data size can be small, but the update operation of the map data of all layers is performed in the navigation device. Increases the processing load on the navigation device and requires a long update time.
Therefore, the present inventors have repeatedly studied to reduce the processing load in the navigation device for updating the map and to shorten the update time, and as a result, the map of all layers in the updated map distribution device (in the map update server) has been obtained. By updating the data and distributing the updated map data of all layers to the navigation device, the inventor has conceived that the updating process is simplified and the processing time is shortened.

The present invention has been made in view of the above problems, and a first aspect thereof is defined as follows. That is,
An updated map distribution device that distributes updated map data to a navigation device,
A map data storage unit that stores map data having a plurality of hierarchical structures with different scales;
An update information receiving unit that receives update information for the map data;
Creating the update map data from the map data based on the received update information, and / or reflecting the update information of the update map data of one layer on the map data of another layer. An update map data creation unit that creates the update map data for all layers,
A distribution unit that distributes the created updated map data of all layers to the navigation device,
An update map distribution device comprising:

  According to the updated map distribution device of the first aspect defined as above, when update information for map data is received, new map data (updated map data) updated from old map data based on the update information. Alternatively, update map data is created by reflecting update information of one layer of update map data on old map data of another layer, and all layers of the created update map data are distributed to the navigation device. By creating the updated map data of all layers by the updated map distribution device and distributing it to the navigation device, the burden on the updating operation in the navigation device is reduced.

The second aspect of the present invention is defined as follows. That is,
In the update map distribution device defined in the first aspect, the map data of the same hierarchy and the updated map data are collated, and the updated map data that matches the map data should be excluded during the distribution. An exclusion target map identifying unit that identifies the exclusion target map,
The distribution unit removes the specified exclusion target map from the updated map data of all the layers to be distributed.
According to the updated map distribution device of the second aspect defined as above, the old map data before the update and the updated map data after the update are compared in the same hierarchy, and when they match, the update map data is updated. Identify map data as excluded maps and exclude them from distribution. For this reason, the distribution data size can be reduced.

The third aspect of the present invention is defined as follows. That is,
An updated map distribution method for distributing updated map data to a navigation device,
A map data storing step of storing map data having a plurality of hierarchical structures having different scales in a map data storage unit;
An update information receiving unit that receives update information for the map data;
The update map data creation unit creates the update map data from the map data based on the received update information, and / or updates the update information of the update map data of one hierarchy to another hierarchy. Updating map data creating step of creating the updated map data of all layers by reflecting the map data on the map data;
A distributing step of distributing the created updated map data of all layers to the navigation device,
An updated map distribution method comprising:
According to the third aspect of the invention defined as above, the same effect as in the first aspect can be obtained.

The fourth aspect of the present invention is defined as follows. That is,
In the method defined in the third aspect, the exclusion target map specifying unit compares the map data of the same hierarchy with the updated map data, and updates the updated map data that matches the map data at the time of the distribution. , An exclusion map identification step to identify exclusion maps to be excluded,
In the distribution step, the specified exclusion target map is excluded from the updated map data of all the layers to be distributed.
According to the fourth aspect of the invention defined in this way, the same effect as in the second aspect can be obtained.

Further, the fifth aspect of the present invention is defined as follows. That is,
A computer program for delivering updated map data to a navigation device, comprising:
Map data storage means for storing map data having a plurality of hierarchical structures having different scales;
Update information receiving means for receiving update information for the map data;
Creating the update map data from the map data based on the received update information, and / or reflecting the update information of the update map data of one layer on the map data of another layer. By means of the update map data creating means for creating the update map data of all layers,
Distribution means for distributing the created updated map data of all layers to the navigation device;
A computer program that functions as a computer.
According to the fifth aspect of the invention defined as above, the same effect as in the first aspect can be obtained.

The sixth aspect of the present invention is defined as follows. That is,
In the computer program defined in the fifth aspect, the computer further comprises:
An exclusion target map specifying unit that collates the map data with the update map data in the same hierarchy and specifies the update map data that matches the map data as an exclusion target map to be excluded in the distribution. Let it work,
The distribution unit removes the specified exclusion target map from the update map data of all the layers to be distributed.
According to the sixth aspect of the invention defined in this way, the same effect as in the second aspect can be obtained.

  A recording medium for recording the computer program defined in the fifth or sixth aspect is defined as a seventh aspect.

FIG. 1 is a block diagram illustrating a configuration of an updated map distribution device 1 according to an embodiment of the present invention. FIG. 2 is a flowchart illustrating an example of an operation of the updated map distribution device 1 according to the embodiment of the present invention. FIG. 3 is a schematic diagram for explaining map data stored in the map data storage unit 3. FIG. 4 includes FIGS. 4 (A) and 4 (B). FIG. 4 (A) shows a method of creating update map data of all layers when update information of each layer exists. 4) is a schematic diagram for explaining a method of creating updated map data of all layers when update information of one layer is present. FIG. 5 is a block diagram showing a configuration of an updated map distribution device 21 according to another embodiment of the present invention. FIG. 6 is a block diagram illustrating a hardware configuration of the update map distribution device 1. FIG. 7 is a block diagram showing a configuration of a map updating system 101 using the updated map distribution device 101 according to the embodiment of the present invention. FIG. 8A is a schematic diagram for explaining a map data configuration stored in the server-side map data storage unit 122, and FIG. 8B is a diagram showing section data for displaying a section X on a map in each hierarchy. It is a schematic diagram for description. FIG. 9 includes FIGS. 9A to 9C, and FIG. 9A is a schematic diagram for explaining a map update process executed by the update map data creation unit 123, and FIG. 9) is a schematic diagram showing distribution data distributed by the distribution unit 125, and FIG. 9C is a schematic diagram for explaining map data stored in the map data storage unit 132 after updating on the navigation device side.

An update map distribution device according to an embodiment of the present invention will be described.
FIG. 1 shows a schematic configuration of the update map distribution device 1. This will be described below with reference to the schematic diagrams shown in FIGS. 3 and 4 as appropriate.
As shown in FIG. 1, the update map distribution device 1 includes a map data storage unit 3, an update information reception unit 5, an update map data creation unit 7, and a distribution unit 9.
The map data storage unit 3 stores map data having a plurality of hierarchical structures having different scales. For example, as shown in FIG. 3, first-layer map data, second-layer map data, and third-layer map data are provided to draw the same area. These map data are configured, for example, as a data group obtained by dividing map data of the whole country into a mesh at regular intervals.
The update information receiving unit 5 receives update information for the map data. Update information is information indicating the difference between the latest map data and the previous map data.Additions, deletions, and corrections are made to the links and nodes that make up the map data, as well as regulatory information, buildings, and terrain, etc. Information for performing the above. The update information may be information for updating old map data of one layer to new map data, or information for updating old map data of two or more layers to new map data. Is also good. Such update information includes difference data expressing a difference between map data in a binary format. Further, the update information may include information on an update date and time, a hierarchy, a generation, and the like.

The update map data creation unit 7 creates update map data of all layers from the map data stored in the map data storage unit 3 based on the update information received by the update information reception unit 5. Here, the update map data may be any data that can update the old map data to the new map data, and includes updated mesh data and difference data between the old map data and the new map data. As one method of creating the update map data of all the layers, when update information for updating the old map data to the update map data exists for all the layers, the hierarchical information is updated based on the update information. The old map data of all layers is updated to new map data every time (see FIG. 4A). As another method, when update information for updating old map data to update map data exists only for a specific layer, update map data is created from the old map data of the corresponding layer based on the update information. Then, the updated map data of all the layers can be created by reflecting the updated contents of the created updated map data on the old map data of the other layers (see FIG. 4B). Such updated map data can be created for each mesh in which update information exists.
The distribution unit 9 distributes the update map data of all layers created by the update map data creation unit 7 to a navigation device (not shown). The delivery unit 9 can deliver, for example, updated map data of all layers corresponding to a nationwide map including an updated mesh. As another example, the distribution unit 9 may distribute only updated map data corresponding to meshes updated for all layers. If the region indicated by the updated map data corresponding to the updated mesh is different for each layer, the data set so that the region is the same for all layers is distributed by combining meshes that have not been updated. You may.

An example of the operation of the update map distribution device 1 shown in FIG. 1 will be described with reference to FIG. In this example, it is assumed that the update information receiving unit 5 receives difference data for updating the first hierarchical map data to the latest map data.
In step 1 (S1) as an update information receiving step, the update information receiving unit 5 receives input of difference data and layer information as update information for the first layer map data. For example, an input of difference data that enables the update of the first-level map data is accepted.
In step 3 (S3) as an update map data creation step, the update map data creation unit 7 refers to the map data storage unit 3 and maps the hierarchy corresponding to the hierarchy information accepted in step 1 (S1). Select data. In this example, the first level map data is selected.
In step 5 (S5) as an update map data creation step, the update map data creation unit 7 performs a process based on the difference data input and received in step 1 (S1) from the map data selected in step 3 (S3). Create updated map data. In this example, first-level updated map data is created.
In step 7 (S7) as an update map data creation step, the update map data creation unit 7 creates update map data of another layer based on the update map data created in step 5 (S5).
In step 9 (S9) as the distribution step, the distribution unit 9 distributes the updated map data of all the first to third layers created in step 5 (S5) and step 7 (S7) to the navigation device.

FIG. 5 shows an updated map distribution device 21 according to another embodiment. 5, the same elements as those of FIG. 1 are denoted by the same reference numerals, and the description thereof will be partially omitted.
FIG. 5 shows an updated map distribution in which the distribution data size can be reduced by specifying, out of the updated map data of all the layers, the updated map data of the layer that matches the map data before the update is excluded from the distribution target. Device 21. That is, the device 21 further includes the storage unit 23 and the exclusion target map specifying unit 25 in the device 1 illustrated in FIG. 1, and includes a distribution unit 27 instead of the distribution unit 9.
The exclusion target map identification unit 25 refers to the storage unit 23 and the map data storage unit 3 in which the updated map data created by the updated map data creation unit 7 is stored, and compares the map data of the same hierarchy and the updated map data. The comparison is performed, and the updated map data that matches the map data before the update is specified as an exclusion target map to be excluded at the time of distribution.
The delivery unit 27 refers to the storage unit 23 and the exclusion target map identification unit 25, and distributes the update map data excluding the update map data of the hierarchy specified as the exclusion target map among the update map data of all hierarchies to the navigation device. I do.

FIG. 6 is a block diagram illustrating a hardware configuration of the update map distribution device 1.
The hardware configuration of the device 1 is such that various elements are connected to a central control device 221 via a system bus 222, as in a general computer system.
The central controller 221 includes a general-purpose CPU, a memory controller, a bus controller, an interrupt controller, and a DMA (direct memory access) device. The system bus 222 also includes data lines, address lines, and control lines. A memory circuit including a RAM (random access memory) 223 and a nonvolatile memory (ROM 224, CMOS-RAM 225, etc.) is connected to the system bus 222. The data stored in the RAM 223 is read or rewritten by the central control device 221 or other hardware elements. The data in the non-volatile memory is read-only and will not be lost when the device is turned off. The system program for controlling the hardware is stored in the hard disk device 227 and is also stored in the RAM 223, and is appropriately read and used by the central control device 221 via the disk drive control device 226. The hard disk device 227 has an area for storing a computer program for operating a general-purpose computer system as the updated map distribution device 1.

A predetermined area of the hard disk device 227 is allocated to a storage unit that stores information created by the update information reception unit 5 and the update map data creation unit 7.
Another area of the hard disk device 227 is allocated to the storage unit 3 for storing map data.
Connected to the system bus 222 are a flexible drive control device 231 for reading and writing data from and to the flexible disk 232, and a CD / DVD control device 233 for reading data from the compact disk 234. In this example, a printer 238 is connected to the printer interface 237.
A keyboard / mouse controller 241 is connected to the system bus 222 so that data can be input from a keyboard 242 and a mouse 243. The monitor 245 is connected to the system bus 222 via the monitor control device 244. As the monitor 245, a CRT type, a liquid crystal type, a plasma display type, or the like can be used.
An empty slot 251 is prepared to enable the addition of various elements (such as a modem).

  Programs (OS programs and application programs (including those of the present invention)) required to operate the updated map distribution device 1 composed of this computer system are installed in the system via various recording media. For example, it can be installed in a non-writable recording medium (CD-ROM, ROM card, etc.), a writable recording medium (FD, DVD, etc.), or a communication medium using the network N. Of course, these programs can be written in the nonvolatile memories 224 and 225 and the hard disk device 227 in advance.

The updated map distribution device can function as a map update system together with a navigation device connected via the Internet or the like.
FIG. 7 shows a schematic configuration of the map updating system 101.
As shown in FIG. 7, the map updating system 101 includes a server device 102 as an updated map distribution device, a first navigation device 103, and second to n-th navigation devices (M2 to Mn). The device 102 and each navigation device are wirelessly connected via the Internet N.
The first navigation device 103 is a communication terminal device that can be carried by the user, such as a mobile phone, a PDA (Portable Digital Assistants), a portable game machine, a notebook PC, a PND (Portable Navigation Device), a smartphone, and a head. It may be a wearable device or the like that can be mounted on the arm or the like.

The server device 102 includes a receiving unit 121, a server-side map data storage unit 122, an updated map data creation unit 123, a storage unit 124, and a distribution unit 125.
The server-side receiving unit 121 receives update information for updating old map data to the latest map data. The server-side receiving unit 121 receives, for example, binary update information. In this example, for example, it is assumed that binary difference data for updating old map data of the first hierarchy to the latest map data is received.
The server-side map data storage unit 122 stores map data of each layer. The map data includes section data corresponding to each section for drawing a navigation map divided into a plurality of sections for each layer, and management data for specifying the section data to be referred to at the time of drawing. . FIG. 8A shows an example of a map data structure stored in the server-side map data storage unit 122. As shown in FIG. 8A, the map data includes management data and section data. In this example, the management data (A) is stored in the management data area. In another area of the storage unit 122, section data of each layer is stored. In detail, as shown in FIG. 8B, the section data C1, C2, C3, C4, C5, C6, C7, C8, C9 of the first layer for displaying the section X at the first scale. Section data D1, D2, D3, D4 of the second hierarchy for displaying at the second scale and section data E1 of the third hierarchy for displaying at the third scale are stored. The section data can be, for example, data obtained by dividing map data of the whole country into a mesh at regular intervals. The management data designates section data for displaying each mesh according to the display scale when displaying the map.

The updated map data creating unit 123 creates each updated map data from the first to third hierarchy map data with reference to the receiving unit 121 and the server-side map data storage unit 122. An example of a method for creating updated map data will be described with reference to FIG. As shown in FIG. 9A, the updated map data creating unit 123 updates the binary difference data (the difference C2 and the difference C2) for updating the section data C2 and C3 of the first-level old map data received by the receiving unit 121. Based on C3), updated partition data C2 'and C3' are created from the partition data C2 and C3, respectively. Then, based on the updated section data C2 'and C3', the section data D1 and D2 of the second-level old map data corresponding to the updated section data C2 'and C3' are updated, and the updated sections are respectively updated. The data D1 'and D2' are created. In a similar manner, the updated section data E1 'is created from the section data E1 of the third-level old map data. Further, when displaying the updated section on a map, the updated map data creating section 123 preferably updates the management data so as to specify the section data of the new map data instead of the section data of the old map data. As another example, the updated map data creating unit 123 converts the pre-updated section data (D1, D2, E1) from the updated section data based on the updated section data C2 ′ and C3 ′ or the difference C2 and the difference C3. May be generated to generate the difference data (difference D1, difference D2, and difference E1).
As shown in FIG. 9B, the distribution unit 125 transmits the updated map data (A ′, C2 ′, C3 ′, D1 ′, D2 ′, E1 ′) created by the updated map data creation unit 123 to the navigation device. 103. The distribution unit 125 can distribute, for example, compressed data obtained by compressing each created update map data into one. As described above, when each of the difference data (difference D1, difference D2, and difference E1) is generated by the update map data creation unit 123, the distribution unit 125 sends all difference data (differences) that can update all layers. C2, difference C3, difference D1, difference D2, and difference E1).

The navigation device 103 includes a receiving unit 131, a navigation-side map data storage unit 132 (see FIG. 9C), and an updating unit 133.
The receiving unit 131 receives, from the server device 102, the updated map data distributed by the distribution unit 125.
Before updating, the navigation-side map data storage unit 132 stores the same map data as the server-side map data storage unit 122.
The updating unit 133 includes a management data updating unit 134 and a partition data updating unit 135.

The management data update unit 134 refers to the reception unit 131 and the map data storage unit 132, and stores the received updated management data (A ′) in the area where the pre-update management data is stored (that is, the management data (A ′)). A) is written in an area different from the area (A)).
The section data updating unit 135 refers to the receiving unit 131 and the map data storage unit 132, and stores the received updated section data (C2 ', C3', D1 ', D2', E1 ') in the section before the update. The data (C2, C3, D1, D2, E1) is written to an area different from the area where the data is stored.

As described above, when writing both the updated data, the updating units 134 and 135 respectively specify an area different from the area in which the data before the update is stored. Therefore, as illustrated in FIG. The pre-update data (A, C2, C3, D1, D2) corresponding to the post-update data (A ', C2', C3 ', D1', D2 ', E1') is stored in the post-update map data storage unit 132. , E1) coexist.
When the section X is displayed on the map at the first reduced scale using the updated map data, the updated management data (A ′) uses the updated section data C2 ′ and C3 ′ instead of the section data C2 and C3. In the case of the second scale, the update section data D1 'and D2' are specified in place of the section data D1 and D2, and in the case of the third scale, the update section data in place of the section data E1 Specify E1 '. Then, when a defect occurs in the post-update section data, the pre-update management data (A) functions in place of the post-update management data (A '), and the pre-update management data (A) is used when the data is displayed on the first reduced scale. For the data (A), the map data corresponding to the section X is displayed by specifying the section data C1 to C9 without specifying the updated section data (C2 ′, C3 ′). According to the map updating system of the present invention, since the pre-update section data remains in the map data storage unit 132 in the navigation device 103, even if a defect occurs in the post-update data, By switching to this data, a map can be displayed continuously.

  Although the embodiments and examples of the present invention have been described above, two or more embodiments (examples) may be combined and implemented. Alternatively, one of the embodiments (examples) may be partially implemented. Further, of these, two or more embodiments (examples) may be partially combined and implemented.

  The present invention is not limited to the description of the embodiment and the example of the above invention. Various modifications are included in the present invention without departing from the scope of the claims and within the scope of those skilled in the art.

1, 21 Update map distribution device 3 Map data storage unit 5 Update information reception unit 7 Update map data creation unit 9, 27 Distribution unit 25 Exclusion target map identification unit

Claims (8)

A map updating system including a navigation device and an updated map distribution device that distributes updated map data to the navigation device,
The update map distribution device,
A first map data storage unit for storing map data having a plurality of hierarchical structures having different contraction scale,
And update information receiving unit that receives the update information for the previous Symbol map data,
On the basis of the update information before Symbol update information accepting unit accepts the map by creating the update map data from the data, and / or one of the update map the update information of other hierarchical data hierarchy An updated map data creating unit that creates the updated map data of all layers by reflecting the updated map data on the map data of
A distribution unit for the update map data of all the layers created by the previous SL update map data generating section, distributed to the navigation device,
The map data of the same hierarchy is compared with the updated map data, and the update map data that matches the map data is specified as an exclusion target map to be excluded by the distribution unit at the time of distribution. And a part ,
The update information, Ri Oh binary data that indicates the difference between the latest of the map data, and previous of the map data,
The distribution unit distributes, excluding the exclusion target map identified by the exclusion target map identification unit from the update map data of all layers,
The navigation device,
A receiving unit that receives the updated map data distributed from the updated map distribution device,
A second map data storage unit storing the same map data as the first map data storage unit;
An updating unit that updates the map data of the second map data storage unit to the updated map data,
Each of the map data and the updated map data is a section data corresponding to each section for drawing a navigation map divided into a plurality of sections for each layer, and a management for designating the section data at the time of map display. Data, and
The management data before update can specify the section data of all layers before update,
The updated map management system is capable of designating the block data of all layers before update and the block data of all layers that have been updated without being updated . 2. The update unit according to claim 1, wherein when writing the update map data into the second map data storage unit, the update unit specifies the area different from the area where the map data before update is stored, and writes the update map data. Map update system . The update unit includes a management data update unit that writes the updated management data to the second map data storage unit, and a partition data update unit that writes the updated partition data to the second map data storage unit. The map updating system according to claim 1 or claim 2 . A method of updating a map for navigation,
An update map data generating step of updating map data having a plurality of hierarchies having different scales stored in the first map data storage unit based on the update data to generate update map data;
An exclusion target map specifying step of comparing the map data and the update map data in the same hierarchy to specify an exclusion target map from which the update map data matching the map data is to be excluded,
The updated map of all layers except for the exclusion target map specified in the exclusion target map specifying step of the map data in the second map data storage unit in which the same map data as the first map data storage unit is stored. An update step of updating to data.
Each of the map data and the updated map data is a section data corresponding to each section for drawing a navigation map divided into a plurality of sections for each layer, and a management for designating the section data at the time of map display. Data, and
The management data before update can specify the section data of all layers before update,
The map updating method, wherein the post-update management data can specify the block data of all the layers before the update that have not been updated and the block data of the updated all the layers . A map update system including a server device and a navigation device,
The server device,
A first map data storage unit that stores map data having a plurality of hierarchical structures with different scales;
An update map data creation unit that updates the map data based on the update data to create update map data of all layers;
A delivery unit that delivers the updated map data to the navigation device; and
The map data of the same hierarchy is compared with the updated map data, and the update map data that matches the map data is specified as an exclusion target map to be excluded by the distribution unit at the time of distribution. And a part,
The distribution unit distributes, excluding the exclusion target map identified by the exclusion target map identification unit from the update map data of all layers,
The navigation device,
A receiving unit that receives the updated map data distributed from the server device;
A second map data storage unit in which the same map data as the first map data storage unit is stored, and
An updating unit that updates the map data of the second map data storage unit to the updated map data,
Each of the map data and the updated map data is a section data corresponding to each section for drawing a navigation map divided into a plurality of sections for each layer, and a management for designating the section data at the time of map display. Data, and
The management data before update can specify the section data of all layers before update,
The updated map management system is capable of designating the block data of all layers before update and the block data of all layers that have been updated without being updated . The update unit may include, in the second map data storage unit, the management data after the update and the partition data after the update in an area different from the area where the management data before the update and the partition data before the update are stored. 6. The map updating system according to claim 5, wherein A server device for a map update system,
The server device includes:
A first map data storage unit that stores map data having a plurality of hierarchical structures with different scales;
An update map data creation unit that updates the map data based on the update data to create update map data of all layers;
A delivery unit that delivers the updated map data to the navigation device; and
The map data of the same hierarchy is compared with the updated map data, and the update map data that matches the map data is specified as an exclusion target map to be excluded by the distribution unit at the time of distribution. And a part,
The distribution unit distributes, excluding the exclusion target map identified by the exclusion target map identification unit from the update map data of all layers,
The management data before update can specify the section data of all layers before update,
A server device for a map update system, wherein the post-update management data can specify the block data of all the layers before the update that have not been updated and the block data of the updated all the layers. A first map data storage unit that stores map data having a plurality of hierarchical structures with different scales;
An update map data creation unit that updates the map data based on the update data to create update map data of all layers;
A delivery unit that delivers the updated map data to the navigation device; and
The map data of the same hierarchy is compared with the updated map data, and the update map data that matches the map data is specified as an exclusion target map to be excluded by the distribution unit at the time of distribution. And a part,
The distribution unit is a navigation device for a map updating system including a server device, which distributes the excluded map specified by the excluded map specifying unit from the updated map data of all layers, excluding the excluded map.
The navigation device is
A receiving unit that receives the updated map data distributed from the server device;
A second map data storage unit in which the same map data as the first map data storage unit is stored, and
An updating unit that updates the map data of the second map data storage unit to the updated map data,
Each of the map data and the updated map data is a section data corresponding to each section for drawing a navigation map divided into a plurality of sections for each layer, and a management for designating the section data at the time of map display. Data, and
The management data before update can specify the section data of all layers before update,
The navigation device for a map updating system, wherein the updated management data can designate the unupdated block data of all layers before update and the updated block data of all layers.

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